Telit Wireless Solutions GE863 - Manual (Page 11)

GE863-GPS Software User Guide
1vv0300724 Rev. 2 - 24/01/07
2.4.1.3 Hardware Unconditional SHUTDOWN
To unconditionally SHUTDOWN the GE863-GPS the pin RESET# must be tied low for at least 200
milliseconds and then released.
A simple circuit to do it is:
RESET#
Unconditional Power OFF
impulse
GND
NOTE: don't use any pull up resistor on the RESET# line nor any totem pole digital output.
Using pull up resistor may bring to latch up problems on the GE863-GPS power regulator and
improper functioning of the module. The line RESET# must be connected only in open
collector configuration.
TIP: The unconditional hardware RESET should be always implemented on the boards and
software should use it as an emergency exit procedure.
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